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(No Model.)

B. BERNSTEIN. PROPELLING APPARATUS.

N0. 511,990. Patented Jan; 2,1894.

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- Nrrnn STATES BENNY BERNSTEIN, OF NEWV YORK, N. Y.

PROPELLING APPARATUS.

SPEGiFIGATION forming part of Letters Patent No. 51 1,990, dated January 2, 1894. Application filed February 16, 1893. Serial No. 462,603. (No model.)

To all whom, it may concern: I

Be it known that I, BENNY BERNSTEIN, a

' citizen of the United States, and a resident of caused to reciprocate either in a horizontal or vertical plane and to rotate simultaneously in either a vertical or horizontal plane, dependent upon the character and requirements of the apparatus, and this without requiring achauge in the direction of rotation'of the driving shaft, so that the blades may have a screw like course and their blades or cutters exert a thrust or pushbontinuously upon and against the medium or matter in which they are rotated.

The invention is illustrated in the accompanying drawings forming a part of this specification, like numerals of reference designating corresponding par 'ts in all the views.

, Figure 1 is a sectional side elevation of the device applied to actuate a propeller for vessels. Fig. 2 is a vertical transverse section of the same, on the line w-ac in Fig. 1; and Fig. 3 is a plan view of a part of the same, hereinafter more particularly described.

The exterior wall of the stern of the vessel 10, shown only in part, has affixed thereto by screws or bolts, the base flange 11 of a circular sleeve bearing 12, andupon the interior wall of the vessel opposite the flange of the bearing 12 is similarly affixed a bearing 13, the latter and the vessel 10 being suitably apertured in alignment with the bore of the bearing 12 to receive and journal the inner portion of the driving shaft 14.

Upon the bearing 12 is imposed a circular hub 15, having formed therein a double cam groove 16, that is, a groove in'jthe shape of a figure 8 as best shown in Fig. 3, and this groove is adapted to receive a guide 17 carried by the bearing-12 as shown in Figs. 1 and with it the propeller blades.

2, while secured at proper points in the body of the hub are blades 18 of the usual or any preferred form and in any requisite number. The lug 17 as shown in Figs. 1 and 2, has a straight member which is swiveledin'the hub 15, and acurved or semicircular member which loosely fits the cam groove 16. The outer end of the bearing 12 is recessed and shouldered as at 12 to receive the correspondingly reduced and shouldered inner end of a cylindrical cap 18 having a tapering outer end which is axiall y apertured and thereby forms a bearing for the outer portion of the driving shaft 14; the cap and hub being held in one y a set screw as shown in Fig. 1.

The driving shaft 14 has fixed thereon in any suitable manner a collar 14 and the collar carries a pin 14 which enters and is adapted to travel in an elongated recess 18 in the cap 18 fora purpose which will presently be explained.

It will be understood that the driving shaft 14 is connected with a source of power whereby the shaft is rotated. I have however not shown such mechanism as it forms no partof my invention, as any of the ordinary and well known means to the end desired may be adopted, it being obvious that the selection is dependent upon the situation of the propelling apparatus and the direction in which it is to be utilized.

When the propelling apparatus is used in connection with propellers for vessels, it is entirely submerged in the water. As the driving shaft 14 is rotated the pin 14 carried by the collar 14 on the shaft, engaging the wall of the recess 18 in the cap 18, causes the hub 15 to rotate in the same direction and carry As the hub rotates, the guide 17 on the bearing 12 travels in the cam groove in the hub, passing from one loop of the groove to the other, the pin 14 alternately engaging the ends of the groove 18 in the hub, so that the hub as it rotates passes outward and inward on the bearing 12, the propeller blades simultaneously and continuouslyrotating in the same direction as that of the driving shaft. The propeller blades have such a pitch and they are so arranged in relation to each other and to the hub, that as the driving shaft is continuously revolved in one direction, the blades on the outward movement of the hub exert their thrust and push in a downward and outward direction upon or against the water, and on the inward movement of the hub, the blades continue to exert the same thrust or push upon or against the water and in the same direction, that is, outward? and downward, as upon the outward movement of the hub; as a result the vessel moves steadily forward. The direction of rotation of the shaft 14 being reversed, a corresponding reversal of the direction of rotation of the hub and blades follows, the thrust or push of the blades being exerted in a direction the opposite of that previously taken, thus causing the vessel to be carried backward. It is the direction of rotation of the blades in connection with the reciprocation of the hub, that determines the direction in which the blades exert their push or thrust, so that so long as the shaft 14 is revolved in one direction the vessel is driven forward, and when revolved in the opposite direction the vessel is carried backward, the hub and blades in each instance rotating continuously and simultaneously in the same direction as that of the shaft. The bearing 12 being stationary, the

travel of the guide in the cam groove in the hub is uniform, and the rotation and reciprocation of the hub is steady and regular; and further the the junction of the two branches of the cam groove being a gradual one, the rotation and reciprocation of the hub and blades is smooth and even and without jar or intermission.

I desire it to be understood that the propelling apparatus is shown in connection with a propeller for vessels only as one instance of its utility, as it may be equally well applied to ventilating fans or to tools having blades carried by a rotatable hub and wherein combined rotary and reciprocatory motion is a desideratum.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent In a propelling apparatus, the combination,

with a bearing sleeve attached to a fixed support, and a guide swiveled to said bearing sleeve and formed with a semi-circular member, of a hub rotatable and reciprocable on said bearing sleeve and carrying blades or fans, and formed with an internal figure 8 shaped cam groove receiving the guide carried by the bearing sleeve, a cylindrical cap attached to, said hub, axially apertured at its free end and formed internally with a longitudinal recess, and a driving shaft j'ournaled in the fixed support, bearing sleeve and cylindrical cap and said shaft carryinga pin entering the groove in said cap and havingplay therein substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 14th day of Feb ruary, 1893.

BENNY BERNSTEIN. Witnesses:

A. B. CHOBOT, M. A. OAssIDY. 

